International Scholarly Research Notices / 2013 / Article / Tab 4

Research Article

Corrosion Inhibition and Adsorption Properties of Ethanolic Extract of Calotropis for Corrosion of Aluminium in Acidic Media

Table 4

Mass loss data for aluminium in 1.0 N sulfuric acid with ethanolic extract of leaves, latex, and fruit of Calotropis gigantea.

Inhibitor concentrationMass loss (gm)
Inhibition efficiency (%)Corrosion rate (mmpy)Surface coverage (θ)

Uninhibited246044.3
Leaves
 0.12126248.6922.70.4869
 0.2495761.0917.20.6109
 0.3673470.1613.20.7016
 0.4864173.9411.50.7394
 0.6052378.739.420.7873
Latex
 0.12124449.4322.40.4943
 0.2495061.3817.10.6138
 0.3676368.9813.70.6898
 0.4861974.8311.10.7483
 0.6052178.829.390.7882
Fruit
 0.12116452.6820.90.5268
 0.2493462.0316.80.6203
 0.3672770.4413.10.7044
 0.4865173.5311.70.7353
 0.6054377.929.780.7792